Cartridge fountain pen



Aug. 1, 1950 J. F. SWEET 2,517,453

CARTRIDGE FOUNTAIN PEN Filed April 27, 1946 I uveu tar Patented Aug. 1, 1950 UNITED STATES PATENT OFFICE CARTRIDGE FOUNTAINPEN John Frederick Sweet, Wilmington; Calif.

Application April 27, 1946, Serial No. 665,568

This invention relates to improvements in fountain pens, and more particularly to a fountain pen utilizing a replaceable ink containing cartridge for its ink supp y.

An object of the invention is to provide an improved fountain pen having a pen point or nib assembly supporting head with an apertured puncturing point at its inner end, adapted to puncture an ink containing cartridge when placed in the barrel section of the pen and said barrel is screwed onto the head.

A further object of the invention is to provide an improved fountain pen construction including a nib assembly supporting head having an apertured puncturing point formed on its inner end, and a renewable ink containing cartridge adapted to be supported in the pen barrel and formed with a seal extending across its forward end and a cooperating apertured head to which the ink containing shell is cemented, together with a vacuum release tube formed on the rear of said head for permitting ink to flow therethrough and to the nib assembly when the pen barrel is screwed onto the nib assembly supporting head, causing the puncturing point to puncture the frangible seal disposed transversely across the front end of the ink cartridge.

Another object of the invention is to provide an improved fountain pen construction employing replaceable and renewable ink cartridges which may be sold separately or in an ink cartridge carrying case, said pen being highly efficient in operation and relatively inexpensive to manufacture and produce.

Other objects will appear as the description proceeds.

In the accompanying drawings which form a part of this application,

Figure 1 is a side elevation of a fountain pen i formed in accordance with the instant invention;

Figure 2 is a longitudinal sectional view through the improved fountain pen;

Figure 3 is a longitudinal sectional view through the fountain pen head;

Figure 4 is a longitudinal sectional view through the socket and ink releasing device;

Figure 5 is a longitudinal sectional view through the threaded stop band;

Figure 6 is a longitudinal sectional view through the ink containing cartridge head;

Figure 7 is a longitudinal sectional view through the frangible seal for the ink cartridge;

Figure 8 is a longitudinal sectional view through the vacuum release tube for the ink cartridge;

4 Claims. (CL 12045.4=)

2 Figure 9 is a longitudinal sectional view through the ink cartridge shell;

Figure 10 is a longitudinal sectional view through the pen barrel; m Figure 11 is an end view of the socket and ink releasing device, and

Figure 12 is an end view of the head for the ink containing cartridge.

Like characters of reference are used through- 'i out the following specification and the accompanying drawings to designate corresponding parts.

In carrying out the invention, there is provided a fountain pen having a head I which is 5a-ygthreaded at 2 on its outer rear surface, and is provided with the annular recess 3 in its rear end portion. A nib assembly 4 including .a pen point 5 is received within the forward end of the head I in the centrally disposed channel or bore 6 gofrformed therethrough.

A combined socket l is formed with an interiorly disposed apertured ink releasing or puncturing point 8 and forwardly extending tube 9 for. carrying ink to the nib assembly. The socket is tthreaded both internally and externally as at H) and II, respectively. I, i

An interiorly threaded spacing band 12 is adapted to thread on the outer surface of the socket l, and is adapted to support the forward "end of the pen barrel I3 which abuts the rear end of the head I.

The ink containing cartridge includes a head It which is reduced at its forward end and is externally threaded at 15. The head 14 is fur- *ther provided with a centrally disposed longitudinal bore it which is reduced at Ill and formed with a conical seat M3 on which the tapered end of the ink releasing and puncturing point 8 is adapted to seat when the several parts 4min the pen are assembled. The forward end of the head it is formed with an enlarged recess l9, and a plurality of concentrically arranged longitudinally extending vent passages 2|] are formed between the central bore [6 and the outer surface of said head l4.

A frangible seal 2| is provided and will be held on the forward end of the ink cartridge head Hi, while a vacuum release tube 22 will be supported in the bore I6 to extend rearwardly into the ink containing shell 23 which will be positioned about the rear end of the head I and suitably cemented thereto.

From the foregoing description, it will be apparent that when it is desired to renew the ink supply for the fountain pen, it is only necessary to remove the pen barrel I3 and extract the used ink cartridge therefrom, and replace it with a full ink cartridge, after which the barrel will be replaced on its cooperating head i, which action will cause the puncturing point 8 to perforate the frangible seal 2 I, thereby permitting the new ink supply in the cartridge shell 23 to flow to the pen point and nib assembly mounted in the pen head I. The usual cap 24 and clip 25 will be provided to fit over the pen barrel 13.

It will be apparent that there has been provided a highly efiicient form of fountain pen construction which utilizes replaceable and renewable ink containing cartridges for its ink supply.

While the preferred embodiment of the instant invention has been illustrated and described, it will be understood that it is not intended to limit the scope of the invention thereto, as many minor changes in detail of construction'may be resorted to without departure from the spirit of the invention.

Having thus described my invention what I claim as new and desire to secure by Letters Patent. of the United States is:

1. A fountain pen including a centrally bored head formed with'an enlarged recess in its inner end and externally threaded at its rear end, a nib assembly disposed in said head terminating flushwith the inner end of said recess, a com bined internally and externally threaded socket having a centrally disposed apertured ink releasing point slidably received in the recess in said head, an ink cartridge having an externally threaded closure head formed with a central longitudinal-bore reduced at its forward end with a surrounding conical seat at the forward end thereof, a frangible seal secured over the forward end of said ink cartridge, vent means through said socket and cartridge head, said cartridge head being threadable into said threaded socket for puncturing, venting and sealing said cartridge to selectively release ink to saidnib assembly, and a barrel disposed about said ink cartridge threadable upon the externally The following references are of record in the threaded socket.

2. A fountain pen including a centrally bored head formed with an enlarged recess in its inner end and externally threaded at its rear end, a nib assembly disposed in said head terminating flush with the inner end of said recess, a combined internally and externally threaded socket having a centrally disposed apertured ink releasing point slidably received in the recess in said head, an ink cartridge having an externally threaded closure head formed with a central longitudinal bore reduced at its forward end with a surrounding conical seat at the forward end thereof, a frangible seal secured over the forward end of said ink cartridge, said socket being formed with an ofiset vent extending parallel with the ink releasing and puncturing point, said cartridge head having circumferentially arranged vents disposed about said central longitudinal bore, said cartridge head being threadable into said threaded socket for puncturing, venting and sealing said cartridge to selectively release ink to said nib assembly, and a barrel disposed about said ink cartridge threadable upon the externally threaded socket.

3. A fountain pen including a centrally bored head formed with an enlarged recess in its inner end and externally threaded at its rear end, a nib assembly disposed in said head terminating flush with the inner end of said recess, a combined internally and externally threaded socket having a centrally disposed apertured ink releasing point slidably received in the recess in said head, an ink cartridge having an externally threaded closure head formed with a central longitudinal bore reduced at its forward endwith a surrounding conical seat at the forward end cured over the forward end of said ink cartridge, said cartridge head being threadable into said socket for puncturing, venting and sealing said. cartridge to selectively release ink to said as-,:

sembly, an internally threaded spacing band disposed about and threaded upon the adjacent externally threaded ends of said socket and said ink cartridge head, and a barrel disposed about said ink cartridge threadable upon the externally threaded socket.

4. The subject matter as claimed in claim 3, and an elongated vacuum. release tube detachably supported in the enlarged central bore. in the rear end of said ink cartridge head.

JOHN FREDERICK SWEET.

nnrnanuoies CITED file of this patent:

UNITED STATES PATENTS Number Name Date 1,472,576 Averill Oct. 30, 1923 1,808,377 Reichenbach June 2, 1931 1,986,372 Sherman Jan. 1, 1935' 2,223,541 Baker Dec. 3, 1940 2,229,749 Little Jan. 28, 1941 2,391,557 Ejerscn Dec. 25, 19 15 OTHER REFERENCES Ser. No. 470,091, Leeuwin (A. P. 0.), published July 13, 1943. 

